How can i lock a MUTEX for an element in the array, not for the complete array
Short version of the question: I have 2 functions that share the same array, when one is editing it, the other is reading it. However, the vector is long (5000 samples) and concurrent access rarely...
View Articlelocking a record in a mysql table
I have a mysql database, which has a table myTable with the parameter id as its primary key. Now, I have a python function which goes like this: def f(user_no): interactWithDB(user_no) Now, this...
View ArticleHow to implement cross platform file lock in GO
I need to implement the following behavior in GO: A process should be able to read a file irrespective if any other process has locked the file for writing A process should obtain a write lock, before...
View Articlelock a specific row in mysql
I am creating a system and data is locked every time users will click on them my question is how will i lock every row or data if the users click on them? i am new in sql locking. This is my code (just...
View ArticleHow mysql table/row lock work
it’s days that I’m reading a lot of the MySQL documentation about table/row locking, but I’m still confused. I’m using InnoDB. The following code will lock the row with id=5 until I commit, so other...
View ArticleHow do I properly stagger thousands of inserts so as not to lock a table?
I have a server that receives data from thousands of locations all over the world. Periodically, that server connects to my DB server and inserts records with multi-insert, some 11,000 rows at a time...
View ArticleAcquire barrier in the double checked locking pattern
In C++ and the Perils of Double-Checked Locking, the authors give an example on how to implement the pattern correctly. Singleton* Singleton::instance () { Singleton* tmp = pInstance; ... // insert...
View ArticleWhy not lock on a value-based class
The docs say that you shouldn’t lock on an instance of a value-based Java class such as Optional because code may produce unpredictable results if it attempts to distinguish two references to equal...
View ArticleVSAM file locking when writing to it using Java JDBC
This is my first time trying to read and write to a VSAM file. What I did was: Created a Map for the File using VSE Navigator Added the Java beans VSE Connector library to my eclipse Java project Use...
View ArticleNeo4j Java OGM select with lock
I am trying to select a path with locking the last node in that path using Java OGM for Neo4j. To do that in cypher I have written the following query: String q = "Match path = (p:Root) -...
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